In the article "New York Under the Rivers Decision: An Epidemiologic Study of Drug Treatment Refusal" by Julie Magno Zito, Ph.D., et al. (July 1991 issue, pp. 904-909), references 15 and 16 in the reference list on p. 909 should be reversed. Reference citation 15 in the text refers to the study by Volavka et al. and reference citation 16 refers to the Zito et al. paper.